I have a Curve 8520 on O2 which on the face of it seems to be connecting well to my BT Homehub. Yet when I run the browser the connection speed is that of a GPRS connection.

In the top right hand corner of the browser, there looks to be a pair of green monitors which indicate a wifi connection. Next to it there's an unlocked padlock symbol. What does this mean ?

I've been trying all sorts to get this to show a locked padlock without success. The one and only time I managed it, the speed of download was blisteringly quick, so much so I was able to watch a few Youtube videos as well. Trouble is, I was fiddling about with all sorts of buttons, I don't know what I did to make this work.